Deep-well pump



B. ANDREWS.

DEEP WELL PUMP.

APPLICATION msu 1M/10,1915.

Patented Aug. 1), 1919.

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BENJAMIN ANDREWS, OF HOUSTON, TEXAS.

DEEP-WELL PUMP.

Specification of Letters Patent.

Application filed May 10, 1918. Serial No. 233.625.

To all whom, t may concern:

Be it known that l, lExJAMIN ANDREWS, a citizen of the United States, and reslding at llouston, in the. county of Harris and State of Texas, have invented new and useful Improvements in Deep-Tell Pumps, of which the following is a specification.

My .invention relates to deep well pumps. Iparticularly to such -pumps employed for pumping oil, and is an improvement on the. pump described in my prior Patent No.

1,013.579, granted January 2, 1912.

` Asistatedjin my prior patent, pumps as commonlyused for pumping oil from deep wells give trouble andl are inefficient owing to the accumulation of sand in the working barrel. This sand flows into the pump with the oil and tends to accumulate in the work- ,mgbarrel;particularly around the valves` 20 'preventing the accumulation of such-sand.

More particularly the object of the present invention is to provide an inl-proved arrangement whereby the accumulation of sand in the main working barrel and around the lower valw forming a part of such barrel, will be prevented; alsoto provide an arrangement which will 'be simple in construction, durafble and efficient, A further object of my invention is to provide an arrangement in which the cleaning Huid employed for flushing out the sand will also.,v operate to prevent sand getting in between the piston and the working barrel. A still further object is to provide an arrangement which will obviate the use of pumps or other'pressure means at the surface of the. ground for flowing the cleaning or flushing fluid into the well.

In the drawing accompanying and forming a part 0f this specification I have illustralted the preferred embodiment of my invention. Referring to this drawing:

Figure 1 shows a vertical section of a well with my improved apparatus installed therein, the pistons being shown near their lower position;

Fig. 2 is a detail view showing the pistons y in raised position;

F ig. 3 is an enlarged section view of the. valve mechanism forming a. part of the mam worklng barrel;

Fig. a transverse sect-ion View taken on the line l-l of Fig. 3.

Referring m detail to the drawing, the

numeral l designates the well in which the pump is to be used. This well maybe provided wit-h a casing 2 perforated as shown through the oil bearing rock, or the well may be uncased dependingon the character of*thevformation. In t-he well a tubing 3, extending from the surface lof the ground down near the bot-tom of the well, is provided and thc pumping apparatus proper is secured vto the lower end of thisV tu'bing. The .pumping apparatus proper comprises a main pump consisting of a working -barrel l and piston 5 and also of an auxiliary pump consisting of a working barrel 6 and piston 7. The working barrels -l and`6 are .Patented Aug. 19, 1919.

and secured to the lower end of the tubing 3. Likewise the pistons 5 and 7 are preferably formed of one piece and are sccured a-.t their upper end to the hollow or tubular sucker rod l8; This tubular sucker rod is connected to and reciprocated by the walking beam or lever 9. The piston 5 is provided at its lower end with a valve 10 whichmay be -ot' any approved construction. This valve opens upwardly and communieates'through the passage 11. with the interior of the tubular sucker rod 8. The working barrel of the main pump is provided at its lower end with a. valve 12 which is shown as a ball check valve. but 'which may be of any approved construction. A

.port or passage 13 extends from the working barrel of the upper or auxiliary pump down through check valve 14 into the main working barrel. The cleaning liquid,-which may ibe oil or water, employed' for washing out the' sand. is supplied into the tubing 3 at. the surface of the well in any suitable way as b v means of a pipe 14. By reason of the construction of the apparatus there is no necessity that this liquid be Howedin under pressure. V

The operation of the pump is as follows; The cleaning Huid. oil or water preferably. is fiowed into the tubing through the pl e 14. lVhen the sucker rod S is raised b v t 1e lever 9. the oil to be pumped. together with more or less sand. is drawn or flows into the working barrel 4. lVhen the pistons approach the upper limit of their stroke. a recess, or port l5, formed in the surface of the piston 7, overrunsthe upper edge 16 of the' working barrel (i thereby permitting this working barrel to fill with Athe cleaning fluid. On the down stroke of the pistons the oil in the working barrel -L is forced up through the valve 10 through the hollow sucker rod 8, and out through the discharge conduit 1T. Also during the down stroke the cleaning fluid is forced by the piston 7 Adown through the port 13, up through the valve 14, being discharged into the working barrel l at and around the valve-l2, thereby scouring and cleaning this valve of any aeeumulation of sand. This fluid alsopasses out through the valve 10 and tends also to keep this valve clean. It follows from the operation described that the fluid in the working barrel (3 is under a greater pressure than the oil in the working barrel 4, and the result of this is that this cleaning fluid tends yto force its wayl down between the piston-5 and the working barrel 4, so as to keep the working surfaces 'of these two parts clean and free of said. and results in greatly prolonging the life of the apparatus.

Whilev I have described my improved apparatus as particularly adapted and intended for pumping oil, it is obvious that it lnay also be used with advantage in water wells and 4in salt wells, .and generallyifor deep well pumping, where there 1s a tendency for sand to How into the wells. Y

Also, while I have described only one em' bodiment of my invention. I am aware that mmliications may be made without departing from the scope of my claims.

ll'hat I claim is:

1. The method of preventing the accumulation of sand in the working barrel of a. deep well pump. comprising delivering a scouring flow of fluid into the Working barrel at a point in the immediate vicinity of the inlet valve within the period when the inlet valve is seated.

A deep well pump comprising a Working barrel, an intake valve for said Workin barrel. and means for delivering a flui from the surface of .the ground into said working barrel adjacent said valve, While said valve is seated.

3. A deep well pump comprising a'working barrel, an intake valve therefor` a second working barrel above the first, pistons in said working barrels connected to and operated b v a common sucker rod. means for delivering a liquid :into the upper working barrel and for forcing it on the down stroke of the sucker rod into the lower working barrel when said lower barrel is under the full static head.

4. A deep well pump comprising a working barrel, an intake valve therefor, a second working barrel above the first.. pistons in said working barrels connected to and operated by a common sucker rod, means for delivering a .liquid into'the upper work ing barrel and for forcing it on the down stroke ofthe sucker rod into the lower working barrel at a point adjacent to the intake valve. off-.the lower working barrel.

luniping apparatus ofthe kind described comprising two working barrels, piH- tons disposed in said barrels and connected to each other and to a hollow sucker rod, meansincluding suitable valves and ports whereby under reciprocation ot' said pistons one piston operates to force fluid from the well to the surface of the ground and the other operates to deliver a cleaning fluid into the working barrel of the first mentioned piston when the barrel of the Iirstl mentioned piston is under the full static head.

6. Pumping apparatus of the kind described comprising two working barrels of different diameters superimposed one on the other, an elongated hollow member having an enlarged-upper portion adapted to function as a piston in the upper working barrel, and a. reduced lower portion adapted to 'function as a piston .in the lower working barreh intake and outlet valves for Said working barrels, means for supplying a Huidto the upper working barrel and for delivering it therefrom into the lower workine' barrel, for' the purpose described.

In an apparatus of the kind described, a pump disposed in the well and adapted to force liquid to the surface of the ground, said pump having'an intake valve, an auX- iliary pump also disposed in the Well, common operating means for both pumps, means for supplying a liquid from the surface of the ,ground to the auxiliary pump, and means for conveying liquid from the auxiliary pump to a point adjacent the intake valve of the main pump.

8.1K deep well pump comprising a main working barrel, an intake'valve therefor,.an auxiliary barrel, pistons in said barrels con- -nected together. 'and -means for delivering a liquid into said auxiliary barrel and for forcing -it on the down stroke of the piston in said main barrel into the main working barrel adjacent said intake valve.

9. In an apparatus of the kind described, a pump disposed in the well and adapted to force liquid to the surface of the ground, an auxiliary pump also disposed inthe Well, said auxiliary pump beingadapted to create a higher pressure than the sta-tic'head on said main pump, common operating means for both pumps, means for supplying a liquid from the surface of the ground to the auxiliary pump, and means for conveying liquid from the auxiliary pump to the main rpump at a. point near the bottom of the working barrel of said main pump.

10. In an apparatus of the kind described, a pump disposed in the well and adapted to 10 valve is seated.

force liquid to the surface of thev ground,

said pump having an intake lvalve, an auX- iliary pump also disposed in the Well, cornmon operating means for both pumps, means for supplying a liquid from the surface of the ground to the auxiliary pump, and meansv` for"l conveyin liquid from the auX- iliary pump to a polnt adjaeent the intake valve of the main pump while said intake 11. A deep Well pump comprising a working barrel, an intake valve for said working barrel, and means for causing a cleaning flow of liquid over the seat of said intake valve While the intake valve is seated.

l2. A deep well pump comprising a Working barrel, an intake valve for said barrel having a seat fixed with respect to the barrel, and means for causing a How of cleaning liquid over the seat of said intake valve 20 while the intake valve is seated.

' BENJAMIN ANDREWS. 

